Fincher, E. B.
The President of the United States
Abelard-Schuman, 1955
 Buku Teks
Resolution and decision adopted by the general assembly during the first part of its forty-fourth session from 19 September to 29 Desember 1989 Department of Public Informetion, United Nations
New York United Nations 1989,
 Buku Teks
Risjord, Norman K.
America a history of the United States
Prentice-Hall, 1985
 Buku Teks
America : a celebration of the United States
Rand McNally and Company.
Rand Mcnally & Company, 2006
 Buku Teks
Education in the United States of America
Washington U.S. Department of Health, Education, and Welfare 1955
 Buku Teks